Each moment is just what it is, it may be the only moment of our life. We could get depressed about it, or we could appreciate it and delight in the preciousness of that moment. We learn to appreciate every single moment of our life by constant practice.
If your ambitions are the result of curiosity and inner desire, rather than greed or lust, and as long as they do no harm to others, they should be exercised rather than suppressed. You may fulfill your ambitions and find out they no longer are important to you, then you are free to go on to something else.
When you have no enemy, you will always be victorious. If you have enemies never underestimate them. Underestimating your enemy is thinking that they are evil, thus you become an enemy yourself. Victory will always go to the one that knows how to yield.
Once we feel we have accomplished something and it is complete, this is the time to be cautious. In life there are times when everything appears to be balanced, complete and in harmony, this is the time to recognize those moments that bode change to an unbalanced state.
Quote: Maintaining order rather than correcting disorder is the ultimate principle of wisdom.